#div_navegacion{
        background-color:white;
        border:#A9D0F5 1px solid; 
    height:50px;
    
}


#div_navegacion li{
        float:left;
        list-style:none;
        margin:0px 20px 0px 20px;
}


#div_navegacion ul{
        margin-left: 300px
}


#div_header{
        text-align: left;/*center;*/
        margin-top: 0px;
        margin-bottom: -3em;
}